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Anthropic sunsets older Claude models, introduces API parameter changes

By PulseAugur Editorial · [1 sources] ·

Anthropic is sunsetting several older Claude API models and endpoints, with deadlines ranging from August 2026 to November 2026. Notably, Claude Opus 4.1 has already been retired. Alongside these deprecations, Anthropic is implementing changes to request parameters, such as disallowing non-default temperature, top_p, and top_k settings on newer models like Claude Opus 4.7 and later, which will result in 400 errors if used. These changes require developers to update their API calls to avoid production failures. AI

IMPACT Developers using the Claude API must update their integrations to accommodate model retirements and parameter changes to avoid service disruptions.

RANK_REASON The item details changes to an existing API product, including deprecations and parameter adjustments, rather than a new model release or fundamental research.

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Anthropic sunsets older Claude models, introduces API parameter changes

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The item details changes to an existing API product, including deprecations and parameter adjustments, rather than a new model release or fundamental research.
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Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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model release, product
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High
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51 days old
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COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · Manu Shukla ·

    5 Claude API deadlines between 17 August and 24 November 2026, and the 400 errors that arrive first

    <h1> 5 Claude API deadlines between 17 August and 24 November 2026, and the 400 errors that arrive first </h1> <p><strong>Summary.</strong> On 17 July 2026 Anthropic announced that the legacy Workbench and three experimental prompt endpoints retire on 17 August 2026 — 31 days' no…

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